From the GOAT himself:
"If I had to pick a center [for an all-time best team], I would take Olajuwon. That leaves out Shaq, Patrick Ewing. It leaves out Wilt Chamberlain. It leaves out a lot of people. And the reason I would take Olajuwon is very simple: he is so versatile because of what he can give you from that position. It's not just his scoring, not just his rebounding or not just his blocked shots. People don't realize he was in the top seven in steals. He always made great decisions on the court. For all facets of the game, I have to give it to him."
Source: Shanken, Marvin. One-on-One with Michael Jordan, Cigar Aficionado, September 1, 2005.